Comments

There was a bug where an exception in the runqueue code would cause an infinite loop
of debug messages. The exception would get reported but would loop since runqueue was
still registered as an idle handler.
This patch adds an exception handler to ensure in the case of errors, the system
more gracefully shuts down and doesn't loop.
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
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